A more thorough explanation:

Definition: Polygyny is the practice of having more than one wife at the same time. It is the opposite of polyandry, which is the practice of having more than one husband at the same time.

Examples:

• In some cultures, wealthy men may have multiple wives.
• Some religious groups allow for polygyny.

These examples illustrate the definition of polygyny by showing situations where a man has more than one wife at the same time. In some cultures, having multiple wives is a sign of wealth and status. In some religions, polygyny is allowed as long as the man can provide for all of his wives equally.